Oral appliance



FIG. 1 is a front perspective view of an oral appliance of a first embodiment of the design;

FIG. 2 is a rear perspective view of the oral appliance as shown in FIG. 1;

FIG. 3 is a front view of the oral appliance as shown in FIG. 1;

FIG. 4 is a rear view of the oral appliance as shown in FIG. 1;

FIG. 5 is a left side view of the oral appliance as shown in FIG. 1;

FIG. 6 is a top plan view of the oral appliance as shown in FIG. 1;

FIG. 7 is a bottom plan view of the oral appliance as shown in FIG. 1;

FIG. 8 is a cross section side view of the oral appliance taken in the direction of line 8-8 of FIG. 6;

FIG. 9 is a front perspective view of an oral appliance of a second embodiment of the design;

FIG. 10 is a rear perspective view of the oral appliance as shown in FIG. 9;

FIG. 11 is a front view of the oral appliance as shown in FIG. 9;

FIG. 12 is a rear view of the oral appliance as shown in FIG. 9;

FIG. 13 is a left side view of the oral appliance as shown in FIG. 9;

FIG. 14 is a top plan view of the oral appliance as shown in FIG. 9;

FIG. 15 is a bottom plan view of the oral appliance as shown in FIG. 9.

FIG. 16 is a front perspective view of an oral appliance of a third embodiment of the design;

FIG. 17 is a rear perspective view of the oral appliance as shown in FIG. 16;

FIG. 18 is a front view of the oral appliance as shown in FIG. 16;

FIG. 18 is a front view of the oral appliance as shown in FIG. 16;

FIG. 19 is a rear view of the oral appliance as shown in FIG. 16;

FIG. 20 is a left side view of the oral appliance as shown in FIG. 16;

FIG. 21 is a top plan view of the oral appliance as shown in FIG. 16;

FIG. 22 is a bottom plan view of the oral appliance as shown in FIG. 16;

FIG. 23 is a front perspective view of an oral appliance of a fourth embodiment of the design;

FIG. 24 is a rear perspective view of the oral appliance as shown in FIG. 23;

FIG. 25 is a front view of the oral appliance as shown in FIG. 23;

FIG. 26 is a rear view of the oral appliance as shown in FIG. 23;

FIG. 27 is a left side view of the oral appliance as shown in FIG. 23;

FIG. 28 is a top plan view of the oral appliance as shown in FIG. 23;

FIG. 29 is a bottom plan view of the oral appliance as shown in FIG. 23;

FIG. 30 is a front perspective view of an oral appliance of a fifth embodiment of the design;

FIG. 31 is a rear perspective view of the oral appliance as shown in FIG. 30;

FIG. 32 is a front view of the oral appliance as shown in FIG. 30;

FIG. 33 is a rear view of the oral appliance as shown in FIG. 30;

FIG. 34 is a left side view of the oral appliance as shown in FIG. 30;

FIG. 35 is a top plan view of the oral appliance as shown in FIG. 30; and,

FIG. 36 is a bottom plan view of the oral appliance shown in FIG. 30. 

CLAIM The ornamental design for an oral appliance, as shown and described. 